GME TX4600 - Manual (Page 6)

PAGE 6 INSTRUCTION MANUAL TX4600
GENERAL OPERATION
FUNCTION KEY
The four keys beneath the TX4600’s display have
both primary and secondary functions. Their
primary functions are printed in Black while their
secondary functions are printed in Red.
To access the primary functions
Simply press the required key. eg. To control the
Squelch, briefly press the SQL key.
To access the secondary functions
Press the F key followed immediately by the
required key. Eg. To Dim the display, briefly press
the F key (‘F’ is displayed), then press the DIM
key. The display will dim.
NOTE: If the secondary key is not pressed within
10 seconds the F key selection will be cancelled.
VOLUME ON/OFF
Rotate the volume control clockwise past the
‘click’ to turn the TX4600 on. Continue to
advance the control clockwise to increase the
volume. Rotate the control counterclockwise to
turn the radio off.
NOTE: At minimum volume setting there is still
sufficient volume to be heard in a quiet cabin
environment.
SELECTING CHANNELS
Briefly press the Channel key to step upwards
one channel or the Channel key to step
downwards one channel. A high beep will be
heard at each press.
Press and hold the or key for 1.5 seconds
to scroll quickly upwards or downwards through
the channels at a rate of 10 channels per second.
When the key is released channel scrolling stops.
TRANSMITTING
Prior to transmitting, always check the channel
is not being used. This can be done by either
listening or by checking the ‘Busy’ indicator is
not lit.
To transmit, press the PTT (Push-to-Talk) button
on the microphone. Hold the microphone about
5-8 cm from your face and speak at a normal
voice level. The microphone is quite sensitive so
it is not necessary to raise your voice or shout.
Release the PTT when you have finished talking.
SQUELCH CONTROL.
The Squelch control is used to eliminate the
background noise when there are no signals
present. The TX4600 features a preset Squelch
system. The Squelch sensitivity has been factory
set to provide optimum performance in most
environments, however the sensitivity can be
altered by the user if required, to suit varying
environmental situations.
The Squelch can be opened or closed with the
SQL key. When the Squelch is open, the receiver’s
background noise can be heard and ‘BUSY’
is displayed. When the Squelch is closed, the
receiver remains quiet when there are no signals
present but an incoming signal will override the
squelch and be heard in the speaker.
To open the Squelch
Briefly press the SQL key. A low beep will be
heard. If there are no signals present you will
hear the receiver’s background noise.
To close the Squelch
Briefly press the SQL key again. A high beep will
be heard and the receiver will become quiet.
NOTE: If an incoming signal is very weak
and is close to the minimum squelch level,
it may become broken or ‘chopped’ by the
squelch action. To prevent this, simply open
the Squelch to allow the signal to be heard
clearly. Alternatively you can reduce the Squelch
sensitivity as described below.
SQUELCH SENSITIVITY
The sensitivity of the Squelch to incoming signals
can be set to suit your operating environment. For
example, excessively noisy environments may cause
the squelch to open on local noise. The TX4600
has ten preset Squelch sensitivity settings that
can be selected using the MENU function.
42333-8_TX4600 IM.indd 6 28/08/13 11:21 AM